Update: Ritty sat in the pedi bath for 10 minutes, did a huge poop (I have never been more proud!) and was climbing around the quarantine tank within minutes!! He looked a lot skinnier after that poop but he ate two dusted smallish locusts and filled out again. He really seems a lot happier. We're not out of the woods yet but he was scaling the walls like a pro - it's amazing, such a huge difference from earlier!

The poop was watery and had lots of little brown flakes in it, it was also pretty large with respect to its owner. Not sure what that means, but I figure some of you guys might?

Thank you everybody so much for all the advice. I would have been panicking and probably overhandling him on my own and I wouldn't even have thought of using pedialyte for frogs.

I've cleaned out the soaking dish and refilled it and I'll give him soaks for the next days and make sure he eats and poops and looks ok.

I've been up through the night here with him so it's bedtime now but thank you, thank you!